9Sofiane Brahim-Belhouari, Amine Bermak. Gaussian process for nonstationary times series prediction[J]. Computational Statistics Data Analysis, 2004, 47(4) :705-712.
10M Girolami, S Rogers. Variational Bayesian multinomial probit regression with Gaussian process priors[J]. Neural Computation, 2006, 18(8):1790-1817.